No problem, we've got 85373392 and 80476831 to multiply
85373392 × 80476831 = 80476831 × (85373392)
+ 80476831 × 2 which equals 160953662
+ 80476831 × 90 what gives us 7242914790
+ 80476831 × 300 giving us 24143049300
+ 80476831 × 3000 what gives us 241430493000
+ 80476831 × 70000 that equals 5633378170000
+ 80476831 × 300000 yielding 24143049300000
+ 80476831 × 5000000 giving us 402384155000000
+ 80476831 × 80000000 giving us 6438146480000000

= 6870580039880752
